package cn.lzd.mr.count.inputformat;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.mapreduce.Job;
import org.apache.hadoop.mapreduce.lib.input.FileInputFormat;
import org.apache.hadoop.mapreduce.lib.output.FileOutputFormat;
import org.apache.hadoop.mapreduce.lib.output.SequenceFileOutputFormat;

import java.io.IOException;

/**
 * 学习：先了解、后深入；先记录、后记忆；先理论、后实践；先模仿、后创新
 * Created by lzd on 2018/5/15.
 */
public class SequenceFileDriver {
    public static void main(String[] args) throws IOException, ClassNotFoundException, InterruptedException {

        args = new String[]{"e:/input/inputinputformat", "e:/output1"};

        Configuration conf = new Configuration();
        Job job = Job.getInstance(conf);
        job.setJarByClass(SequenceFileDriver.class);

        job.setMapperClass(SequenceFileMapper.class);
        job.setReducerClass(SequenceFileReducer.class);

        job.setMapOutputKeyClass(Text.class);
        job.setMapOutputValueClass(BytesWritable.class);
        job.setOutputKeyClass(Text.class);
        job.setOutputValueClass(BytesWritable.class);

        // 设置输入的 inputFormat
        job.setInputFormatClass(WholeFileinputformat.class);
        FileInputFormat.setInputPaths(job, new Path(args[0]));

        // 设置输出的 outputFormat
        job.setOutputFormatClass(SequenceFileOutputFormat.class);
        FileOutputFormat.setOutputPath(job, new Path(args[1]));


        boolean result = job.waitForCompletion(true);
        System.exit(result ? 0 : 1);
    }
}
